APPEJ^DIX. 



SYI^OPSES OE GEIEEA 



STREPTANTHUS. 



The synopsis of this genus given by Dr. Gray in Froc. Amer. Acad., Vol. VI., pp. 183-188, (1863,) is 

 retained, with the necessary changes indicated in the note upon StrepUnthus on page 19. A single more 

 recent species is added. 



§ 1. EUSTEEPTANTHUS, Endl. Petals with a broad and ample plane lamina ; sepals suberect or 

 erect; flowers rather large, rose-purple; cauUne leaves all sessile and cordate-clasping, glabrous 

 and more or less glaucous. 



* Flowers aU subtended by persistent bracts. 



1. S. BBACTEATUS, Gray. Silique elongated-linear, 6' long, spreading ; mature seeds not known.— 

 Texas. 



* * Flowers (or aU but the lowest) ebracteate. 



2. S. PLATYCARPUS, Gray. Siliques oblong-linear, 2^3" wide, very flat, erect; leaves clasping by 

 rather short and rounded lobes, the lower and radical ones lyrate-piunatifid. — S. W. Texas. 



3. S. MACULATus, Nutt. Siliques narrowly linear, 3-4' long and 1" wide, erect or ascending ; oauline 

 leaves clasping by long and obtuse lobes, the sinus very deep and nearly closed. — Arkansas and E. Texas- 



§ 2. EUCLISIA, Nutt. Petals undulate-crisped, the lamina narrow or attenuated, scarcely if at all 

 broader than the claw ; sepals connivent, mostly colored, often saccate at base ; the longer sta- 

 mens often connate. 



• Whoify glabrous and mostly glaucous, 

 (a.) Cauline leaves clasping by a cordate or sagittate base. 



4. S. CABINATTJS, Wright. Flowers purple, \' long, the urceolate calyx carinately 5-saccate ; pedicels 

 of the flowers and of the broadly linear and flat (half-grown) siliques erect ; radical and lower cauline 

 leaves runcinate-pinnatifid, the upper ones sagittate-clasping, aU very glaucous; seeds unknown. — 

 S. W. Texas. 



5. S. COEDATUS, Nutt. Leaves thick, obtuse, toothed only at the apex. See page 19. 



6. S. TORTUOSDS, KeU. Stem paniculately branched, or simple, 1-2° high ; leaves entire or denticu- 

 late, the oauline suborbioular, cordate-clasping with a closed sinus ; flowers purple or yellowish, 6" long, 

 in a lax raceme, the spreading or ascending pedicels 2-3" long, the lowest often leafy-bracted ; buds and 

 sepals usually long-acuminate ; siliqne narrowly linear, 2-3' long, 1" wide, falcately reourved-spreading, 

 short-stipitate; seeds "winged" or wingless. — California. 



7. S. Bbeweri, Gray. Annual, 9'-2° high, branched from near the base, glabrous and glaucous ; 

 cauline leaves, except the lowest, strongly cordate-clasping with a closed sinus, entire or denticulate, the 

 uppermost sagittate ; flowers purple, on very short ascending pedicels, the lowest often leafy-bracted ; 

 buds 3" long, obtuse or acutish, the sepals with scarious recurved blunt tips, sometimes downy ; silique 

 narrowly linear, li-3J' long, less than 1" wide, ascending or erect, straight or slightly incurved, com- 

 pressed but torulose ; seeds wholly marginless. — California. 



(6.) Cauline leaves not cordate nor auriculate at base, entire or very obscurely toothed ; sepals not 

 dissimilar. 



8. S. HYACINTHOIDBS, Hook. Leaves Unear-lanoeolate and oblong-Unear ; flowers in a virgate ra- 

 ceme, spreading and soon pendulous, green and violet-purple; calyx oylindraceous ; siliques erect- 

 spreading, 2-4' long, 1" wide; seed narrowly margined. — E. Texas and S. W. Arkansas. 



(e.) Leaves filiform, entire, some of them sagittate with a subclasping base; two outer sepals 

 broadly dilated. 



